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EC number: 205-582-1
CAS number: 143-07-7
No tests are required due to ready biodegradability of category members Fatty Acids.
The category members Fatty Acids are readily
biodegradable. In accordance with column 2 of EC 1907/2006 Annex IX
184.108.40.206 water and sediment simulation testing is not required for readily
For the sake of completeness available experimental results on
simulation tests to assess the biodegradability of chemicals discharged
in wastewater are summarized for the category member stearic acid (CAS
experimental results for determining the extent and kinetics of primary
and ultimate biodegradation by activated sludge are available for
stearic acid since the substance is used as positive reference substance
in a test design similar to OECD Guideline 314 B.
Biodegradation of radiolabeled stearic acid in the mixed liquor
(water-soluble fraction and sorbed fraction; approximately 2500 mg/L
suspended solids) during activated sewage treatment was determined. A
known amount of stearic acid (1.0 or 0.1 mg/L) was added to the biotic
sludge systems (abiotic systems were not tested in deviation to the
guideline) and monitored for 28 days up to 140 days. The conversion of
radiolabeled test substance to radiolabeled CO2 was measured by trapping
evolved CO2 in base traps and by quantifying dissolved CO2 by LSC. The
resulting data was used to develop the elimination rate of stearic acid
and the extent of overall mineralization.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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